Can anyone recognise the song used in this ad?

[svpworld]

I remember hearing this pop song years ago, the main riff is very distinctive.  I can't remember the name of the song though!
This is from the latest UK advert for Panadol Extra Advance medicine (pain killers), they have done an orchestrated arrangement of the tune.

Hopefully someone recognises it! :-)

P.S. I had to rename the file extension to mpg in order to upload it - but it's actually an m4a audio file.

Edit by Roger Brenizer: I've removed the attachment.  Please don't circumvent the allowed file types by changing the file extension.  We don't allow certain file types to be attached for security purposes.  Please upload your files to an online storage account and subsequently post a link to the file in your topic or post.

[DerekA]

It is Symphony, by Clean Bandit

[svpworld]

Thank you Derek!  You saved my brain going into meltdown.

Simon